Effective nitrogen removal during different periods of a field-scale bioretention system

Bioretention systems are designed to manage stormwater, but they are always subject to substantial nitrate leaching. In previous laboratory-scale experiments, nitrate removal was enhanced using wood chips as a medium. However, the ability of field-scale systems to transform and remove nitrogen speci...

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Bibliographic Details
Published in:Environmental science and pollution research international 2018-06, Vol.25 (18), p.17855-17861
Main Authors: Wan, Zhexi, Li, Tian, Liu, Yutong
Format: Article
Language:English
Subjects:
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
bioretention areas
Composting
Denitrification
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental science
Hydraulic loading
Laboratories
Leaching
Load distribution
Loading rate
Nitrate removal
Nitrates
Nitrates - chemistry
Nitrogen
Nitrogen - chemistry
Nitrogen removal
Nutrient removal
Pollutants
Rain
Research Article
Retention basins
Runoff
species
Stormwater
Stormwater management
Waste Water Technology
Water Management
Water Pollution Control
Water Purification - methods
Wood
Wood chips
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Summary:Bioretention systems are designed to manage stormwater, but they are always subject to substantial nitrate leaching. In previous laboratory-scale experiments, nitrate removal was enhanced using wood chips as a medium. However, the ability of field-scale systems to transform and remove nitrogen species is not well understood. Here, we report a wood-chip bioretention system that accepts the natural runoff from an elevated highway. The transformation of different nitrogen species indicates that the field-scale system with wood chips also inhibits nitrogen leaching. Nitrate removal was mainly found during the wet period, and was affected by the hydraulic loading rate of the system. Overall, this study showed that the field performance of the wood-chip bioretention system effectively removes nitrogen. In addition, the main period associated with the nitrogen removal process was identified.
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-018-1954-x